Nailing machine



I June 13, 1933. H. w. MORGAN 1,913,717

NAILING MACHINE Filed 001:. 12, 1951 3 Sheets-Sheet l INVENTOR 5 I BY 9 59 June 13, 1933. H. w. MORGAN NAILING MACHINE Filed Oct. 12, 1931 3 Sheets-Sheet 2 finry Wrm BY %z\'9 ATTORNEY June 13, 1933. w QR 1,913,717

NAILING MACHINE Filed Oct. 12, 1951 5 Sheets-Sheet 3 %ZJS ATTORNEY a Patented an, 13, .1933

m, or 'IBRIGHTQN, new yon g assrenoa To monelm maonmn com r w I :PANY, mo.,.or noonns'rnn, new YORK, a conrona'rron or ,nnwyonx.

ama momma The presentinvention relatesto a nailing" machine and hasrfor its object to provide an} improved machine of this class for operating upon different forms of work and embodying a simple and practical arrangement of a parts which is comparatively inexpensive to manufacture and efiicient inoperation.

A further object of the uivention is the provision of improved means for positioning work pieces which are example, by nailing to diflerent or similar] forms :of work. s

A further object of the invention is to provide improvedwork'positioningmeans in which theoperatmg mechamsm for position ing the work is properly timed with respect to other means for-operating upon the work,

such for example,; as an automatic nailing tdevicerw' .A still further object of the invention is. to provideimproved means for positioning cleats, strips, and the like at pointsrelatively inaccessible in orderthat they may be at-H tached: as bygnailing, to otherforms of work,v

and'to construct said means so as to insure positive and uniform operationof the parts withproper adjustment to t accommodate workpieces of different dimensions.

=1To'these and other ends the invention re- 7 sides in certain improvements and combinations of parts, all as will be hereinafter more 1 fully described, the novel features being i pointed out in the claims at the end of theff p v specificatiom r r In thedravvings: j

nailing machine embodying the invention,

. the parts being in their'normal position ready. 1

, for application of the work thereto 'Fig'. 2 is a similar view with the. work in I position and being operated upon by the nail:

the mainframe being broken away to show thecamior operating thework 3 \poS'itiOningmeChaniSm; 1 e

T igw3-isa horizontal brokenaway to show certain elements ofthe driving means,

cam operated mechanism; i y a Fig. 4 'is a fragmentary sectional elevation 3 taken'substantially on line ia-4a of Fig. 3;

I Fig; 5isa sectional elevation through an taken on line5a5a of Fig. 21;

to be attached, as for w Figlil isa fragmentary end elevationof a section with parts operating connection for the Work positioning means,drawn to anenlarged scale an Fig. 6 is a sectional elevation drawn to an enlarged scale, taken on line 6a-,6a of Fig. 2 and illustrating the construction of the rocker for moving the Work positioning means Fig. '7 is a vertical section illustrating de- The inventionillustrated inthe drawings while adapted .for. use in the positioning of d fferent classes of work to be operatedupon', is particularly designed. for positioning rela= tively narrow sections of material at predetermined points for attachment to other forms of work, as for eziample, sheets of. veneer or other board-like material. The po sitioning means is not only adjustable to take care of slight variationsin the width or thick-.

ness of. the work pieces, but maybe adjusted to accommodate work pieces of difierent size varylng between predetermined limits as pointed out hereinafter.

the upright standards or frame members of a nailing machine, thestandards being pro Referring to the drawlngs, 10 represents vided with guideways .11 ontheir front faces.

A Worksupport12 preferablyin the formof a'table is arranged ton-adjustment up and down on the guideways in accordance with the thickness of the work tobe operated upon by suitable adjusting means,notshown.

q The nailing mechanism may be of any suitable type, and preferablygcomprises a nailing head l ihaving a seriesof nail drivers or'.

plungers 15' for operation within suitable chucks 16 ona holding device 17, the chucks being supplied with nails by tubes 18 leading from an-overhead nail hopper, notshowns I The nailing head and chuck holding device are reciprocated upon the guideways 111 by means of apair of connecting rods 19, the: upperends of the rods engagingpivot pins work engagingends. of the fingers whenthey 20 on the nailing head having rollers 20a thereon and the lower ends of the rods being connected to eccentric straps 21 on a pair of eccentrics 22 fixed to a shaft 23 driven by suitable means not shown, operating to effect a single revolution of the shaft foreach. nail driving operation. tated in a clockwise direction from the POST:

tion shown in Fig. 1, the rods 19 are drawn downwardly and operate to pull'down the nailing head1'4. Upon downward movement of the rods the rollers 20a, which extend into suitable cam slots in levers 24 pivotally connected at 2464 with the standards 10, cause the levers to swing downwardly. The chuck holding device 17 is connected with the levers by means of a pair of rods 25 surrounded by coil d springs 26 which cause the chuck holding device to move downwardly until the chucks 16 come in contact with the top of the work to be operated upon, such as the sheet of veneer 27 which overlies and is to be nailed to a cleat 28 on the table 12. After the chuck engages the top of the work and comes to rest thereon. the links 19 are permitted to continue their downward movement by reason of further compression of the springs 26 and thus the driving head 14 will operate the nail driving plungers 15 to drive the nails into the work. I

Where it is. desired to drive the nails through a work piece of relatively large area such. as the sheet of veneer 27 into another workpiece therebeneath, such as the cleat or batten 28, the larger work piece prevents con-5 venlent access to the. smaller work piece. and

it is therefore dihicult for the. operator to satisfactorily position the latter by hand. The present invention embodies mechanism operable automatically to position the lower work piece in proper relation to the overlying work piece, which mechanism operates beneath the overlying work piece without displacing or interferingtherewith.

A suitable stop 29 for the work is mounted on the support 12 to properly position the work, the stop being adjustable whereby to vary the distance of the nails from the edge of the work. Vhen the back stop has been adjusted to the desired position the work 28 maybe moved'into contact therewith by the mechanismprovided where it will be ready to receive the nails to be driven therein.

The work positioning means comprises a plurality of finger-like members constituting pusher bars 31 located beneath the table and having their free ends resting upon inclined faces 32 of the table which form the inclined bottom surfaces of the slots 33 formed in the table. the side walls 32w of the slots serving to guide the fingers from the lowered positionshown in Figs. land 7 to the elevated operating position shown in Fig. 2. The inclined faces 32. serve as raised means for the VVhen the shaft is rothe jaws 34"and 35 of the vertical are moved rearwardly and during this time the fingers will move through the openings and engage the work pieces lying on the table near the rear edge thereof to position them against the back stop'29, thus properly positioning the work with respect to the overlying work piece 27 beneath which the fingers operate.

The front ends of the fingers lie between arms 36 fixed on a' rock shaft 37 beneath the table, .the fingers being supported between said jaws by pivot pins 38 as best shown in Fig. 9. V The pin in each case is provided with a movable handle portion 39 and can be released by gripping said portion and moving the pin longitudinally which at this time is released by a plunger 40 within the jaw 34 of the arm and held in engagement withthepin by a light spring 41. The plunger and springare supported by a detach able plug 42 threaded within the jaw 34, Fig. 9. The pin is provided'lwith'a longitudinal groove .43 at the ends of which are provided notches 44 and 45 for receiving the end of the plunger 40 which holds the pin against accidental displacement. If for any reason it is desired to disconnect the fingers from the arms, the pins 39 can be shifted from the position shown in F igs.;4 and 9 by an outward pull thereon and as soon as the pin is moved to a position atwhich. the notch 45 is in registry with the plunger 40, the latter will move into the notch and secure the permitwithdrawal of the finger. WVith this arrangement the fingers canbe quickly attachedto and removed from :the operating arms withoutxcompletely removing the pin,

which otherwise might become lost or misplaced.

The rock shaft 37 has its oppositeends journaled .in suitable. bearings 46 carried by the vertically extending plates 47 on the;

underside of the table 12 as best shown in Figs. 31 and 4. The rock shaft carries a depending operating device 48 comprising a pair of connected members held on the shaft' by a key 49 and spaced apart at their lower ends to receive a nut 50 having trunnions 51 at its opposite sides journaled in the armlike portions of the device-as shownin Fig. 6.

The nut has adjustable therein ascrew 52 provided with oppositely disposed longitudinally extending slots 53 for receiving the" operating pin in position toone or the other of theslots 53 of the screw has beenbrought' into registry withthe upper end of the latch: .The screw is operated'by ahand wheel 52a -which is'secured against turningrelative to the screwby. a key 53a,

Figs 5. The hand: wheel can be gripped by. the fingers and turned. to adjust thescrew for the purpose of regulating the position of y the arms 36 to obtain the proper movement of the work. positioningfingers 31 in order to regulate. the pressure against the work pieces 28 and to. accommodate the fingers to cleats of different sizes within certain limits when moving the cleats in contact with the back stop-29.. A certain degree of adjust ment maybe effected by means of the screw by reason of the. oppositelykdisposed slots 53 whichpermit of a halfturnuadjustment of the crating rod 57 having on its outer end anut.

screw. Extending through the screw 52 is an op- 58 seated on a flexible washer 58a. disposed on the outer end ofthe screwto afford a comparatively noiseless operation when the rod is a returning to the position shown in Fig. 5.

i a The rear end ofthe rod is disposedcbetween thejaws of an operating arm or lever 59 and connectedtherewith by a pivotpin 60 carried' by said jaws. A spring 61 surrounds the rod i innerend ofthescrew. The opposite end of and has oneend seated on a bearing 62 on the the spring isseated on a nut 63 on the threaded portion. of the rod, the nut being adjustable.

to properly' tension the spring whereby to regulate-the pressure ofthelfingers 31 against 64 is provided on the rodiforholding the nut 63'against.

the workpiece 28.1 A look nut lever carries a-pivot.pin 69 on which is mounted a roller 70: projecting within the roove 71 ofithe cam, the cam being designed tofoperate'theflever andthe parts actuated thereby, .including the work positioning fingers in mechanism.

within the screw 52 so that on the outward stroke ofthe rod the nut 5 8fwill move away fromits seat on the washerw58abut on the. return stroke the nut willengage the washer 1? and positively return the operating parts, in

The spring. 61 on the operatingrod 57 will if the work positioning fingers should -encounter any obstruction tending to prevent further movement thereof, yield sufliciently to avoid breaking of the parts. Itwill be.

understood that the rod .;57-is free to. slide proper. timed relation with respect to the driving operations of the nailing spring on the threads cluding the 1armsl36 andifingers 31. to1normal inoperative position, as shown in Fig. :1.

Oneof the important features of: the inventiontembodies the ideaof operating the work positioning: fingers 31 through slots in the tableiby means of the rock shaft 37carry ing the arms86 and fingers pivotally mounted thereon as described above. Thisis a simplilied and very practical and eflicient arrangement which isoperated with a single har-. monic cam, through the medium of: the lever 59, arm 48, and yieldable. connection shown in Fig. 5 between the arm and lever. The parts driven bythe camiare all located be neath the table andin advance of the upright frame members so that they {do not interfere with the operators movementsl but at-the same time being readily. accessible and easy,

- to assemble and repair while avoiding. the

disadvantages of protruding parts pro ecting beyond the body or framework of the machine. With thisarrangement, thel lingers 31 are permitted to swing about their pivotal axes while moving. to advance the work, as distinguished from j'sliding non-pivotal movement in a. straight path. .With the present arrangement therefore, the inner or free. ends of the fingers are. substantially horizontal when in work holding position, as shown in Fig. 2, and the. pressure ,is thus applied at right angles to theaxisiozt the nail driving plunger, which is both desirable and advantageous.

The. manner of mounting the pivot pins 3 8 assho'wn in Fig. 9 isahighly desirable improvement, sinceit permits of quick detachabillty of the work positioning fingers with- V out having to remove thepivot pins, which can be readilyradjusted to releaseposition, in which the plunger 40 will engage in notch 45* and also readily move into holding position as shown in Fig. 9. 1

The improvements embodied in theresilir ent connection between the operatinglever 59;

and the rockerarrn 48 previously described,

not only serve to prevent breakage of the:

parts,,should the fingers operatedthereby c1 1 counter obstructing means tending to prevent normal-operation thereof, but of .a nature to afi'ord acfonsiderable range ofadjustment to take care of variations in the. dimensions of the work operated jupon by the-fingers. A. further advantage in this resilientconnection liesin the particular manner of mounting the. adjusting screw 52 topermit of easy opera;

tion thereof without unduepressure by the.

of thescrew as pointedoutabove.

l V In operation of the machine the cleat or. workpiece 28 is positioned on the table or support 12 adjacentjthe stop 29 and the sheet or board Q'Zis then placed iniposition asshown in Figsl and 2. If the'work piece 28 ifsnot, in proper position againstthestop 29, the fingers-31 upon being advanced during operation of the nailing machine will'move said work piece into engagement with the stop as shown in Fig. 2. Advancement of the fingers will be afforded at the proper time upon operating a clutch or other driving means for the shaft '23, not shown, which afi'ords a complete revolution of the shaft from the position shown in Fig. 1. This will cause the driving head 14 and chuck holding device to move downwardly and at the sametime the cam 68will rock the shaft 37 to advance the work positioning fingers which movement is preferably completed prior to the time the chucks are moved into engagement with the work piece 27 so that the work positioning members will not have to operate against the resistance which would be caused by contact of the chuck with the work in advance of the positioning operation. A dwell on the cam holds the work positioningmeans in the effective position shown in Fig.2 while the chucks and nail driving plunger complete their operation, after which the cam relieves the work positioning mechanism andthe parts are returned to normal position. I

' While one embodiment of the invention has been shown and described, it will be understood that the invention is not limited to the specific arrangement ofparts disclosed, but is intended to cover different variations and modifications falling within the spirit of the invention or the scope of the appended claims.

I claim:

1. In a nailing machine, the combination of a frame, a work support thereon having a part inclined to the horizontal nailing mechanism movable upon the frame to engage a work piece overlying the support to secure it to a second work piece movable beneath the first, an oscillatory member beneath the support, a positioning member having one end arranged upon said inclined part for elevation thereby adapted to engageand move said second work piece to a predetermined position beneath the overlying work piece and having its other end operatively engaged by said oscillatory member, and means for actuating said nailing mechanism and said oscillatory member in proper timed relation.

2. In a nailing machine, the combination of a frame, a work support thereon provided with a stop for the work, nailing mechanism movable upon the frame, driving means operatively connected with the nailing mech-. anism, an oscillatory member beneath the work support having an upstanding portion thereon, a push bar slidableuponthe support and'connected'with said portion for direct operation thereby and operableflthrough the latter to move a work piece on the support into engagement with said stop, and means actuated by said driving means for operating said osc llatory member.

3. In a nailing machine, the combinationof a Work support, nailing mechanism, operating means for said nailing mechanism, a rock shaft, arms carried by the rock shaft, work positioning members individually connected with the arms at one end and having their opposite ends extending from a point below the support upwardly through an opening therein and free to move upon the support to position thework thereon, and means for oscillating said rock shaft arranged to be actuated by the operating means for the nailing mechanism in timed relation to said nailing mechanism. 1

4. In a nailing machine, the combination of a frame, a work supporting table thereon, nailing mechanism movable upon the frame, operating means for said nailing mechanism, a rock shaft spaced below the table, arms extending upwardly from the rock shaft beneath the table, a positioning member connected with each arm, said members having their work engaging ends arranged for operation through openings in the table to engage and position the work on the latter, and means for oscillating the said rock shaft arranged to be actuated by the operating means for the nailing mechanism in time relation with respect to said nailing mechanism.

5. In a nailing machine, the combination of a frame, a work supporting table having a work stop thereon, nailing mechanism movable upon the frame, operating means for the nailing mechanism, a rock shaft spaced below the table, arms extending upwardly from the rock shaft beneath thetable, work positioning members beneath the table each directly connected with one of the arms at one end and having their opposite ends supported by the table and arranged for upward movement thereby through openings formed therein to an elevated position whereby to move the work into engagement with said stop, and means for oscillating said rock shaft. I

6. In a nailing machine, the combination of a frame, a work supporting table having a work stop thereon, nailing mechanism movable upon the frame, operating means for the nailing mechanism, a rock shaft spaced below the table, arms extending upwardly from the rock shaft beneath the table, work positioning fingers beneath the table each operatively connected with one of the arms at one end, said fingers having their opposite ends supported by the table for movement upwardly thereby through openings formed therein to an elevated position whereby to move the work into engagement with said stop, a cam driven by the operating means for the nailing mechanism,,a lever actuated by the cam, and an operating member on the rock shaft and yieldable operating means between the lever and said opera-ting member for moving the latter to operate the rock shaft.

support, a vertically disposed -member mounted for oscillationbeneath the support, a substantiall {horizontal pushbaribeneath thetlsupport aving one-,endwdirectly connected with said member and itsother end apart belowits upper surface inclined to the restingron andwarrangedto be elevated by said inclined. partofv-the support to a position above the support during advancement of the push bar whereby to move said second work piece intoengagement with ssaid stop,

and resilient operating means for said meme l8 In "a nailing, machii e, the f combination of a frame,"a work support thereon having horizontal, a work stopon the support, nailing mechanism movable upon the frameto engagea work piece tosecure it to a second workpiece disposed therebeneathon the'support, i a vertically disposed member mounted for oscillatiombeneath the su port, a sub: stantially horizontal push, bar beneath the supporthaving one endoperatively engaged by saidmember and its other end resting on a and arranged to beelevated by said inclined part Ofvthe support toaposition above the support duringadvancement of the pushbar whereby to :movesaidlsecond workpiece beneath the first into engagement with said stop, aresilient operating connection for said member, an operating element for reciprocating said connection, and a camfor actuating said operatingelement. a

9. In a nailing machine, the combination of a frame, a work support thereon having a part below its up er surface inclined to the horizontal, a wor stop on the support, nailing mechanism movable upon the frame to engage a work piece to secure it to a second work piece disposed therebeneath on the support, a vertically disposed arm mounted for oscillation beneath the support, a substantially horizontalpush bar beneaththe sup porthavingone end operatively connected with said arm and its other end resting on and arranged to be elevated by said'inclined part of the support to a position above the support during advancement of the push bar whereby to move said second work piece beneath the first-into engagement with said stop, an operating connection for said arm comprising parts adjustable one longitudinally of another to vary the eii'ective length of the connection, a lever operatively engaging the connection, a cam for operating the lever, and drivingmeans for said cam.

10. In a nailingmachine, the combination of a frame, a work support thereon having a part belowits upper surface inclinedto the horizontal, a work stop on the support, nail engage a work piece overlying the support to secure it to a secondw-ork piece dis-posed therebeneath, an upstanding arm= mount for oscillation beneath the support,a substantially horizontal push bar :beneath the sup portlhaving one end operatively connected with said arm and its other end resting 'on andarranged to be elevated by said inclined part of the support to a position above the support during: advancement of the pushhar whereby to move saidasecondiwork piece beneath the first into engagement with saidstop, an operatingconnection for said arm adjustable to vary"itspositionlwithrespectto said mg mechanismlmovable uponthe frame to a work stoppan operating member for reciproeating said oonnection a cam operatively connected: with said member, and a drive shaft operatively connected with said nailing mechanism said cam beingdriven "by said shaft in proper timed relation to said nailing mechanism.

11. In a nailing machine, the combination with awork support havingfarstop thereon forthe work and nailing mechanism for oper ating upon the work, of positioning mechanism for a work piece on the support comprising an element operable-to move said work piecetinto engagement with thestop, and relatively movable operating devices for said element having :an operating connection therebetween comprising-a member adj ustably mounted on one; ofsaid'operating devices to vary the efl'ectivelength of said connection, arodi connected with the other of said operating devices and slidablyfmounted insaid member,- and a means operating? to yieldingly resist movemen't of the rod ,duringinovement ofi' the partstoloperatingpositions k: 1 12. I a, machine of the class described, positioning means for a work pieceto beoperated upon by a nail driving mechanism; including a positioning element and relatively movable operating parts therefor having a resilient operating connection therebetween comprising a screw adjustably mountedon oneotsaid parts, an. operating rod forthe screwiconnected at oneend with the other oi said parts and havingia limited movement w -ithinwthe screw, an abutment on the rod, spring means interposed between; the; abut-L m ent and the screw tending to urge them in opposite directions, and a releasable locking member for holding: j the screwagainst turning. p a

1 13. In a inachineaof the class described,

positioning meansrfor. a workpieceto be oper ating parts, a screw threadedly engaging the nut, an operating rod connected at one end with the other of said parts and extending through the screw and provided at its free end with anabutment, spring means on the rod tending to move the rod and screw in opposite directions, means adjustable on the rod :to vary the tension of-the spring means, said screw having one or more longitudinally extending grooves therein, and a gravity operated. latch arranged to enter the groove in a predetermined position of the'screw whereby to'hold the screw against turning.

14. In a nailing machine of the class described, a'support for holding a work piece, means iormoving thework. piece to a predetermined position upon the support comprising a vertically disposed rocker arm at one side of the support having spaced jaws.

at its free end, a push bar for positioning the work piece upon the support having one end extending between the jaws of said rocker arm, a pin pivotally receiving said push bar end between said jaws, said pin having a longitudinally extending groove therein and notches adjacent the ends of the groove, and a spring pressed plunger in-one of said jaws normally engaging said :pin in one of the notches to hold it in position to support said push bar, said pin being adj ustable by a sliding movement between predetermined release and holding positions and said plunger moving automatically into the notches of the pin" when adjusted to said positions, the pin being held against turningby the plunger in all positions of the latter.

15. In a nailing machine of the class described, positioning means fora work piece to be operated upon by a nail driving mecha nism forming a part of the machine, comprising an oscillatory member, operating means for said member, a second member comprising a push bar for positioning said work piece, a pin pivotally connecting said members and slidably mounted in the walls thereof between operating and release positions, said pin having a longitudinally extending groove'and having notches at the ends of the groove, and a spring pressed member movable relative to the pin adapted to engage it within the groove when the pin is moved between said positions whereby to hold it against turning and adapted to automatically move into the notches when in registry therewith to arrest movement of the pin at said different positions.

16. In a nailing machine, the combination with a work supporting means having stop means thereon for the work, of nailing meche anlsm for driving nails into the work, a work engaging member normally spaced laterally from the work at a point below the surface of the supporting means, and control means for moving the work engaging member in a vertical-direction and simultaneously reciprocating it transverselyvofrsaid direction to cause it"to move into engagement with the work and to be withdrawn therefrom to normal position below the surface of the supporting means, said control means including an oscillatory operating part for the work engaging member extending upwardly beneath the work supporting means and directly connected with said work engaging member, said operating part moving in timed relation, to the operation of the nailing mechanism.

17. In a nailing'machine, the combination with a frame, a work support adjustable upon the frame, of nailing mechanism for driving nails into the work, work engaging and positioning means normally spaced laterally from the Work at a point below the surface of the support and movable bodily with the support upon adjustment of the latter upon the frame, and control means for moving the work engaging means in a vertical direction and simultaneously reciprocating it transversely of said direction to cause it to move into engagement with the work and to be withdrawn therefrom to normal position below the surface ofthe work supportin means, said control means including an oscillatory operating part for the work engag ng and positioning means extending upwardly beneath the work supporting means and directly connected with said work engaging and'positioning means, said operating part moving in timed relation to the operation of the nailing mechanism.

HENRY w. MORGAN. 

